The Photorealist paintings of Paul Caranicas (b. 1946) have a limpid quality, as if the monumental architecture he depicts -- and architecture is frequently his subject, often paired with an uncertain, marginal natural landscape -- are transparent illusions rather than masses of concrete and steel. Awesome in scale and precise in their delineation, his skyscrapers seem to breathe with their own ghostly spirit, one that may fade away at any moment.